The Teensy 4.1 boards supports one of these 8-pin 64MB (512M-bit) Flash chips to expand the memory on the module primarily for use with the LittleFS library
- Winbond W25Q512JV SMD IC (WSON Package)
KEY FEATURES OF 64MB SERIAL FLASH:
- 64MB (512M-bit) memory organized as 262.144 pages x 256 bytes
- SPI / Dual SPI / Quad SPI Interface
- 133/266/532MHz clock rate
- 3.3V operation
These ICs provide additional non-volatile memory for the Teensy 4.1 board.
The larger footprint on the bottom of the board supports one of these 64MB Flash chips. The PCB pads are designed for an SOIC chip, but the WSON package can be soldered in the location if care is exercised. Since the leads are tucked under the sides of the chip, soldering and testing the chip before the header pins are installed is highly recommended. An unsoldered chip is shown in the location below.
Note that the bottom of the chip has a rectangular metal pad. This pad is not connected to anything in the chip, but can be a possible shorting hazard across the PCB pads if the chip is not centered on the pads. Keeping solder limited to the outer portion of the board pads helps to minimize that concern. It may be desirable to cover the pad with Kapton tape or similar insulator to avoid the possibility of shorting.
The PaulStoffregen/LittleFS Library can be used to work with this chip.
|Vcc||2.7V – 3.6V|
|Package Type||Plastic body, 8-pad WSON 8x6mm|